Fix an issue with the default type of memoize_default nt being a set.

jedi/evaluate/iterable.py

@@ -476,7 +476,7 @@ def check_array_additions(evaluator, array):
     return _check_array_additions(evaluator, array, current_module, is_list)
 
 
-@memoize_default([], evaluator_is_first_arg=True)
+@memoize_default(default=set(), evaluator_is_first_arg=True)
 @debug.increase_indent
 def _check_array_additions(evaluator, compare_array, module, is_list):
     """

jedi/evaluate/recursion.py

@@ -18,7 +18,7 @@ def recursion_decorator(func):
         rec_detect = evaluator.recursion_detector
         # print stmt, len(self.node_statements())
         if rec_detect.push_stmt(stmt):
-            return []
+            return set()
         else:
             result = func(evaluator, stmt, *args, **kwargs)
             rec_detect.pop_stmt()
@@ -119,7 +119,7 @@ class ExecutionRecursionDetector(object):
         debug.dbg('Execution recursions: %s', execution, self.recursion_level,
                   self.execution_count, len(self.execution_funcs))
         if self.check_recursion(execution):
-            result = []
+            result = set()
         else:
             result = self.func(execution)
         self.pop_execution()

jedi/evaluate/representation.py

@@ -609,7 +609,7 @@ class FunctionExecution(Executed):
         self.children = new_func.children
         self.names_dict = new_func.names_dict
 
-    @memoize_default(default=())
+    @memoize_default(default=set())
     @recursion.execution_recursion_decorator
     def get_return_types(self, check_yields=False):
         func = self.base
@@ -644,6 +644,7 @@ class FunctionExecution(Executed):
                 break
         return types
 
+    # TODO add execution_recursion_decorator
     def get_yield_types(self):
         yields = self.yields
         stopAt = tree.ForStmt, tree.WhileStmt, FunctionExecution
@@ -679,7 +680,7 @@ class FunctionExecution(Executed):
                     yield evaluator.eval_element(yield_.children[1])
             else:
                 for_types = evaluator.eval_element(for_stmt.get_input_node())
-                ordered = iterable.ordered_elements_of_iterable(evaluator, for_types, [])
+                ordered = iterable.ordered_elements_of_iterable(evaluator, for_types, set())
                 for index_types in ordered:
                     dct = {str(for_stmt.children[1]): index_types}
                     evaluator.predefined_if_name_dict_dict[for_stmt] = dct